[PATCH v15 11/13] usb: chipidea: udc: misuse flag CI_HDRC_REGS_SHARED and CI_HDRC_PULLUP_ON_VBUS

Peter Chen peter.chen at freescale.com
Sun Aug 11 21:22:57 EDT 2013

CI_HDRC_REGS_SHARED stands for the controller registers is shared
with other USB drivers, if all USB drivers are at chipidea/, it doesn't
needed to set.
CI_HDRC_PULLUP_ON_VBUS stands for pullup dp when the vbus is on. This
flag doesn't need to set if the vbus is always on for gadget
since dp has always pulled up after the gadget has initialized.

So, the current code seems to misuse this two flags.
- When the gadget initializes, the controller doesn't need to run if
it depends on vbus (CI_HDRC_PULLUP_ON_VBUS), it does not
relate to shared register.
- When the gadget starts (load one gadget module), the controller
can run if vbus is on (CI_HDRC_PULLUP_ON_VBUS), it also does not
relate to shared register.

Tested-by: Marek Vasut <marex at denx.de>
Signed-off-by: Peter Chen <peter.chen at freescale.com>
 drivers/usb/chipidea/udc.c |    5 ++---
 1 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index c70ce38..45abf4d 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1637,8 +1637,7 @@ static int ci_udc_start(struct usb_gadget *gadget,
 	if (ci->platdata->flags & CI_HDRC_PULLUP_ON_VBUS) {
 		if (ci->vbus_active) {
-			if (ci->platdata->flags & CI_HDRC_REGS_SHARED)
-				hw_device_reset(ci, USBMODE_CM_DC);
+			hw_device_reset(ci, USBMODE_CM_DC);
 		} else {
 			goto done;
@@ -1801,7 +1800,7 @@ static int udc_start(struct ci_hdrc *ci)
-	if (!(ci->platdata->flags & CI_HDRC_REGS_SHARED)) {
+	if (!(ci->platdata->flags & CI_HDRC_PULLUP_ON_VBUS)) {
 		retval = hw_device_reset(ci, USBMODE_CM_DC);
 		if (retval)
 			goto put_transceiver;

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